A Wyoming zoo’s plans for a new exhibit called for keeping the animals as close to the public as possible.The idea of heated concrete “rocks” located close to the exhibit’s glass separation panels was sure to attract the animals in the colder months. And a heated pool for the otters that might like to take an occasional dip seemed to be the ticket to keep them lively throughout the winter. The only issues were: keeping the animals from harming the controls that were providing their comfort, and, potentially, harming themselves.- The heated pools utilized a specially modified Chromalox over-the-side (OTS) heater to be used in a containment sump that circulates to the outside environment.

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